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1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

3. Extensions to Mendelian Inheritance

Sex Chromosome

Genetics

3. Extensions to Mendelian Inheritance

Sex Chromosome

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Multiple Choice

In humans, what determines the sex of offspring, and why?

The sex of offspring is determined by the number of autosomes inherited from each parent.

The sex of offspring is determined by the type of sex chromosome carried by the sperm, because males produce both X and Y sperm while females produce only X eggs.

The sex of offspring is determined by environmental factors after fertilization, not by chromosomes.

The sex of offspring is determined by the type of sex chromosome carried by the egg, because females can produce both X and Y eggs.

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Verified step by step guidance

Understand that in humans, sex determination is based on sex chromosomes, not autosomes or environmental factors.

Recall that females have two X chromosomes (XX) and produce eggs that all carry an X chromosome.

Recall that males have one X and one Y chromosome (XY) and produce sperm that carry either an X or a Y chromosome.

Recognize that the sex of the offspring depends on which type of sperm fertilizes the egg: an X-carrying sperm results in a female (XX), and a Y-carrying sperm results in a male (XY).

Conclude that the determining factor is the type of sex chromosome carried by the sperm, because males produce both X and Y sperm, while females produce only X eggs.